Hollow insulating rod torsion testing machine

Abstract

A hollow insulating rod torsion testing machine belongs to the technical field of hollow insulating rod testing. The machine comprises a workbench, opposite to which are arranged two docking heads for locking the two end heads of the hollow insulating rod, and a driving mechanism arranged on the surface of the workbench, the rotating shaft of the driving mechanism is coaxially fixed with one of the two docking heads. The machine is characterized in that: the two docking heads are a fixed quick connector (3) and a movable quick connector (12) arranged oppositely, the fixed quick connector (3) and the movable quick connector (12) are respectively provided with locking blocks which are axially movable and lock the end heads of the hollow insulating rod, and a measuring mechanism for detecting the rotation angle of the hollow insulating rod is arranged between the fixed quick connector (3) and the movable quick connector (12). In the hollow insulating rod torsion testing machine, the fixed quick connector and the movable quick connector are arranged to realize quick locking with the end heads of the hollow insulating rod, thereby improving the testing efficiency.

Description

Technical Field

[0001] A torsion testing machine for hollow insulating rods belongs to the field of hollow insulating rod testing technology. Background Technology

[0002] Hollow insulating rods are a common type of insulating device. Before use, they need to undergo torsional performance testing to determine their strength and plasticity. Current torsional performance testing methods all employ torsion testing machines. During testing, both ends of the hollow insulating rod are fixed, and then one end is rotated to apply torque to the rod, thus testing whether it meets national standards. This is exemplified by the technical solution described in Chinese Utility Model Patent Application No. 201921927725.X, filed on November 8, 2019, entitled "An Insulating Rod Torsion Testing Machine".

[0003] Existing technologies, including the aforementioned technical solutions, typically use various tightening structures to lock the ends of hollow insulating rods before testing, such as the chuck structure used in the above technical solutions. This locking structure is cumbersome to operate, reduces testing efficiency, and makes it difficult to achieve a balanced clamping force on both ends of the hollow insulating rod. Therefore, designing a technical solution that can quickly lock both ends of the hollow insulating rod to improve testing efficiency has become an urgent problem to be solved in this field. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a hollow insulating rod torsion testing machine that achieves rapid locking with the end of the hollow insulating rod by setting a fixed quick connector and a movable quick connector, thereby improving the testing efficiency.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: The hollow insulating rod torsion testing machine includes a worktable, and a coupling is provided on the surface of the worktable to lock the two ends of the hollow insulating rod. A driving mechanism is also provided on the surface of the worktable. The rotating shaft of the driving mechanism is coaxially fixed with one of the couplings. The coupling is characterized in that: the coupling is a fixed quick coupling and a movable quick coupling arranged opposite to each other. The fixed quick coupling and the movable quick coupling are respectively provided with locking blocks that move axially and lock the ends of the hollow insulating rod. A measuring mechanism for detecting the rotation angle of the hollow insulating rod is also provided between the fixed quick coupling and the movable quick coupling.

[0006] Preferably, a fixed frame is fixed on the surface of the worktable, a drive mechanism is installed on one side of the fixed frame, and the rotating shaft of the drive mechanism passes through the fixed frame and is coaxially fixed with the fixed quick connector; a translation mechanism is slidably arranged on the surface of the worktable, and a moving quick connector is installed on the surface of the translation mechanism.

[0007] Preferably, the measuring mechanism includes a test frame erected on the surface of the workbench, a torque sensor is provided on the surface of the test frame, a hollow insulating rod passes through the torque sensor and is connected to the torque sensor.

[0008] Preferably, the test fixture is slidably mounted on the workbench surface.

[0009] Preferably, the movable quick connector includes a movable locking sleeve fixed to the surface of the translation mechanism. The movable locking sleeve has an inner cavity with its port facing the fixed quick connector. The inner cavity is a conical cavity with a narrow inner surface and a wide outer surface. The locking blocks in the movable quick connector are multiple movable locking blocks that are evenly and spaced apart in the inner cavity of the movable locking sleeve. The outer walls of the multiple movable locking blocks surround and form a conical surface. A movable limiting disc is provided at the port of the inner cavity of the movable locking sleeve.

[0010] Preferably, the translation mechanism includes a movable base plate that is slidably disposed on the surface of the worktable, a movable frame that is erected on the surface of the movable base plate, and a movable quick connector that is fixed on the end face of the movable frame facing the fixed quick connector.

[0011] Preferably, the fixed quick connector includes a fixed locking sleeve fixed at the drive mechanism shaft. The fixed locking sleeve has an inner cavity with its port facing the movable quick connector. The inner cavity is a conical cavity with a narrow inner surface and a wide outer surface. The locking blocks in the fixed quick connector are multiple fixed locking blocks that are evenly and spaced apart in the inner cavity of the fixed locking sleeve. The outer walls of the multiple fixed locking blocks surround and form a conical surface. A fixed limiting plate is provided at the port of the inner cavity of the fixed locking sleeve.

[0012] Preferably, a protective cover is also slidably provided on the surface of the worktable.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] In the hollow insulating rod torsion testing machine of this application, by setting a fixed quick connector and a moving quick connector, rapid locking with the end of the hollow insulating rod is achieved, thereby improving testing efficiency.

[0015] A protective cover is installed on the surface of the workbench. The front and rear ends of the cover are slidably connected to the corresponding side rails, allowing the cover to slide along the length of the cabinet. During testing, a hollow insulating rod is placed inside the cover to improve safety during testing.

[0016] The locking blocks in both the fixed and movable quick-connect couplings are removable for easy replacement, making them suitable for testing hollow insulating rods of different diameters. Attached Figure Description

[0017] Figure 1 This is an isometric view of a torsion testing machine for hollow insulating rods.

[0018] Figure 2This is a front view of a hollow insulating rod torsion testing machine.

[0019] Figure 3 for Figure 2 The rear view of the fixed and movable machine covers is omitted.

[0020] Figure 4 for Figure 3 Top view.

[0021] Figure 5 for Figure 3 Sectional view along the AA direction.

[0022] Figure 6 for Figure 3 Sectional view along the BB direction.

[0023] Figure 7 for Figure 3 Sectional view along the CC direction.

[0024] Figure 8 for Figure 5 Partial sectional view along the DD direction.

[0025] Figure 9 for Figure 7 Partial sectional view of the EE direction.

[0026] The components include: 1. Fixed cover; 2. Operating area; 3. Fixed quick connector; 4. Test cylinder; 5. Torque sensor; 6. Test frame; 7. Test guide rail; 8. Protective cover; 9. Cabinet; 10. Slide rail; 11. Side rail; 12. Moving quick connector; 13. Moving cover; 14. Drive motor; 15. Fixed frame; 16. Moving transmission sleeve; 17. Transmission shaft; 18. Moving frame; 19. Moving base plate; 20. Slider; 21. Fixed limit plate; 22. Fixed locking block; 23. Fastening screw; 24. Moving locking block; 25. Moving limit plate; 26. Limit sleeve; 27. Fixed locking sleeve; 28. Fixed transmission sleeve; 29. ​​First positioning pin; 30. Second positioning pin; 31. Moving locking sleeve. Detailed Implementation

[0027] Figures 1-9 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figures 1-9 The present invention will be further described below.

[0028] like Figures 1-2 As shown, a hollow insulating rod torsion testing machine includes a cabinet 9, the surface of which is a workbench. A fixed cover 1 is provided at one end of the workbench, and a fixed quick connector 3 is led out from the side of the fixed cover 1. An operating area 2 is provided on the surface of the fixed cover 1, and multiple buttons are provided in the operating area 2 for controlling the rotation or stopping of the fixed quick connector 3.

[0029] Two slide rails 10 are arranged side by side on the workbench surface, along the length of the cabinet 9. The two slide rails 10 are spaced apart from the fixed cover 1 at one end near the fixed cover 1, and the other ends extend to the edge of the workbench. A movable cover 13 is slidably mounted on the surface of the two slide rails 10. A quick-connect fitting 12 is mounted on the end face of the movable cover 13 facing the fixed cover 1. The quick-connect fitting 12 and the fixed quick-connect fitting 3 are positioned opposite each other, and their axes are collinear. The two ends of the hollow insulating rod to be tested (not shown in the figure) are fixed in the quick-connect fitting 12 and the fixed quick-connect fitting 3 respectively, and the fixed quick-connect fitting 3 provides the test torque to achieve torque testing of the hollow insulating rod.

[0030] A side rail 11 is provided at the upper end of the front and rear ends of the cabinet 9. A protective cover 8 is mounted on the workbench surface. The front and rear ends of the protective cover 8 are slidably connected to the corresponding side rail 11, so that the protective cover 8 can slide along the length of the cabinet 9. During testing, a hollow insulating rod is placed inside it to improve the safety of the test.

[0031] A torque testing mechanism is also provided on the surface of the workbench. The torque testing mechanism includes a test guide rail 7 set on the surface of the workbench. The test guide rail 7 is a single rail and is located between the slide rail 10 and the fixed cover 1. At the same time, the test guide rail 7 is arranged in the same direction as the two slide rails 10 and is located at the center line of the two slide rails 10.

[0032] A test frame 6 is slidably mounted on the surface of the test guide rail 7. The upright plate of the test frame 6 stands on the surface of the workbench. A through hole is provided on the upper part of the upright plate of the test frame 6. A torque sensor 5 is mounted on one end face of the test frame 6. The torque sensor 5 is implemented using a commercially available ring-shaped hollow encoder. The torque sensor 5 is coaxially mounted with the through hole on the surface of the test frame 6. The outer ring of the torque sensor 5 is fixed to the surface of the test frame 6, and a test cylinder 4 is coaxially fixed to the inner ring of the torque sensor 5.

[0033] The test cylinder 4, torque sensor 5, moving quick connector 12, fixed quick connector 3, and the hollow insulating rod used during testing are all collinear. Multiple fastening screws 23 are evenly distributed around the perimeter of the test cylinder 4 (see...). Figure 6 The fastening screw 23 penetrates radially through the wall of the test cylinder 4 and is threadedly connected to the side view. During the test, the hollow insulating rod is coaxially fixed to the test cylinder 4 by the fastening screw 23.

[0034] Combination Figures 3-4 A fixing frame 15 is provided inside the fixing cover 1. The fixing frame 15 is fixed to the surface of the worktable. A drive motor 14 is fixed to one side of the fixing frame 15. The drive motor 14 passes through the fixing frame 15 and is coaxially fixed to the fixing quick connector 3. Figure 5 as well as Figure 8A fixed transmission sleeve 28 is coaxially fixed to the motor shaft of the drive motor 14. An opening is provided on the end face of the fixed transmission sleeve 28 facing the movable housing 13, and a fixed locking sleeve 27 is placed within this opening. The fixed transmission sleeve 28 and the fixed locking sleeve 27 are fitted together using a non-circular structure, allowing the fixed transmission sleeve 28 to transmit the torque output from the drive motor 14 to the fixed locking sleeve 27. Bearings are provided at the front and rear of the area where the fixed transmission sleeve 28 and the fixed locking sleeve 27 are fitted together, and the inner diameter of the fixed transmission sleeve 28 is larger than the outer diameter of the fixed locking sleeve 27, ensuring that while the fixed transmission sleeve 28 and the fixed locking sleeve 27 are coaxial, there is still a certain amount of rotational allowance.

[0035] A limiting sleeve 26 is fixed at the port of the fixed transmission sleeve 28, and the fixing locking sleeve 27 is locked inside the fixed transmission sleeve 28 by the limiting sleeve 26. The fixing locking sleeve 27 has an inner cavity, and the port of the inner cavity faces the moving cover 13. The inner cavity of the fixing locking sleeve 27 is a conical cavity with a narrow inner diameter and a wide outer diameter. Multiple fixing locking blocks 22 are evenly and spaced in the inner cavity of the fixing locking sleeve 27. A fixing limiting plate 21 is also provided at the port of the fixing locking sleeve 27. The circumference of the fixing limiting plate 21 is fixed to the circumference of the limiting sleeve 26. The fixing locking blocks 22 are locked in the inner cavity of the fixing locking sleeve 27 by the fixing limiting plate 21, and it is convenient to replace the fixing locking blocks 22 to adapt to the testing of hollow insulating rods with different outer diameters.

[0036] The locking block 22 is locked in the inner cavity of the locking sleeve 27 and can move axially. The outer wall of the locking block 22 is inclined. After all the locking blocks 22 are mated, their outer walls form a conical surface that matches the inner cavity of the locking sleeve 27. When the hollow insulating rod to be tested is inserted, the locking blocks 22 are pushed into the inner cavity of the locking sleeve 27. Under the guidance of the conical structure of the inner cavity of the locking sleeve 27, all the locking blocks 22 gradually tighten, locking the hollow insulating rod.

[0037] like Figures 6-7 As shown, a movable base plate 19 is horizontally arranged inside the movable cover 13. Slider blocks 20 are fixed on both sides of the bottom of the movable base plate 19, and the sliders 20 on both sides are slidably connected to two slide rails 10 respectively. Two movable frames 18 are erected at intervals on the surface of the movable base plate 19. The drive shaft 17 passes through the front and rear movable frames 18. Grooves are opened on the surface of the drive shaft 17 corresponding to the positions of the two movable frames 18. A first positioning pin 29 is provided in the groove of the drive shaft 17 away from the fixed cover 1. Screws are provided on the surface of the corresponding movable frame 18. The screws pass through the movable frame 18 and are screwed into the first positioning pin 29 to fix the drive shaft 17 to the movable frame 18.

[0038] like Figure 9As shown, a movable transmission sleeve 16 is fitted inside the movable frame 18 near the fixed cover 1 on the surface of the movable base plate 19. The movable transmission sleeve 16 is also fitted outside the transmission shaft 17. The transmission shaft 17 and one end of the transmission sleeve 16 are coaxially fixed by a second positioning pin 30. A bearing is installed between the movable transmission sleeve 16 and the corresponding movable frame 18. The width of the groove on the surface of the transmission shaft 17 is greater than the width of the first positioning pin 29 and the second positioning pin 30. Under the premise that the transmission shaft 17, the movable transmission sleeve 16, and the movable frame 18 are coaxial, there is still a certain rotational margin.

[0039] A movable locking sleeve 31 is coaxially fixed at one end face of the movable transmission sleeve facing the fixed housing 1. The movable locking sleeve 31 has an inner cavity, the port of which faces the fixed housing 1. The inner cavity of the movable locking sleeve 31 is a conical cavity with a narrow inner diameter and a wide outer diameter. Multiple movable locking blocks 24 are evenly and spaced within the inner cavity of the movable locking sleeve 31. A movable limiting disc 25 is also provided at the port of the movable locking sleeve 31. The circumference of the fixed limiting disc 21 is fixed to the circumference of the movable locking sleeve 31. The movable locking blocks 24 are locked in the inner cavity of the movable locking sleeve 31 by the movable limiting disc 25, which also facilitates the replacement of the movable locking blocks 24 to adapt to the testing of hollow insulating rods with different outer diameters.

[0040] Furthermore, the movable locking block 24 is locked within the inner cavity of the movable locking sleeve 31 and can move axially. The outer wall of the movable locking block 24 is inclined. After all the movable locking blocks 24 are connected, their outer walls form a conical surface that matches the inner cavity of the movable locking sleeve 31. When the hollow insulating rod to be tested is inserted, the movable locking blocks 24 are pushed into the inner cavity of the movable locking sleeve 31. Guided by the conical structure of the inner cavity of the movable locking sleeve 31, all the movable locking blocks 24 gradually tighten, locking the hollow insulating rod.

[0041] The specific working process and working principle are as follows:

[0042] The hollow insulating rod to be tested is passed through the test cylinder 4, and at the same time, it passes through the torque sensor 5. The movable housing 13 is pushed towards the fixed housing 1. After both ends of the hollow insulating rod enter the fixed quick connector 3 and the movable quick connector 12 respectively, the movable housing 13 is pushed further. At this time, one end of the hollow insulating rod pushes the fixed locking block 22 into the inner end of the fixed locking sleeve 27 in the fixed quick connector 3. Under the guidance of the conical structure inside the fixed locking sleeve 27, all the fixed locking blocks 22 gradually tighten, locking one end of the hollow insulating rod. At the same time, the other end of the hollow insulating rod pushes the movable locking block 24 into the inner end of the movable locking sleeve 31 in the movable quick connector 12. Under the guidance of the conical structure inside the movable locking sleeve 31, all the movable locking blocks 24 gradually tighten, locking one end of the hollow insulating rod. Then, the hollow insulating rod is coaxially fixed to the test cylinder 4 by fastening screw 23, that is, the hollow insulating rod is fixed to the inner ring of the torque sensor 5.

[0043] The protective cover 8 is pushed to house the hollow insulating rod inside, and the drive motor 14 rotates. The torque is transmitted to the hollow insulating rod through the fixed quick connector 3, causing the hollow insulating rod to twist. At the same time, the torque sensor 5 measures the twisting angle of the hollow insulating rod. Since the direction of torque transmission is perpendicular to the locking direction of the hollow insulating rod during the torque test, the two ends of the hollow insulating rod will not loosen until the test is completed according to the test requirements.

[0044] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A torsion testing machine for hollow insulating rods, comprising a worktable, with locking connectors for locking the two ends of a hollow insulating rod disposed opposite each other on the surface of the worktable, and a drive mechanism disposed on the surface of the worktable, the shaft of the drive mechanism being coaxially fixed with one of the locking connectors, characterized in that: The connector consists of a fixed quick connector (3) and a movable quick connector (12) arranged opposite to each other. The fixed quick connector (3) and the movable quick connector (12) are respectively provided with locking blocks that move axially and lock the end of the hollow insulating rod. A measuring mechanism for detecting the rotation angle of the hollow insulating rod is also provided between the fixed quick connector (3) and the movable quick connector (12).

2. The hollow insulating rod torsion testing machine according to claim 1, characterized in that: A fixed frame (15) is fixed on the surface of the worktable. The drive mechanism is installed on one side of the fixed frame (15). The rotating shaft of the drive mechanism passes through the fixed frame (15) and is coaxially fixed with the fixed quick connector (3). A translation mechanism is slidably provided on the surface of the worktable. The moving quick connector (12) is installed on the surface of the translation mechanism.

3. The hollow insulating rod torsion testing machine according to claim 1, characterized in that: The measuring mechanism includes a test frame (6) erected on the surface of the workbench, a torque sensor (5) is provided on the surface of the test frame (6), and a hollow insulating rod passes through the torque sensor (5) and is connected to the torque sensor (5).

4. The hollow insulating rod torsion testing machine according to claim 3, characterized in that: The test fixture (6) is slidably set on the workbench surface.

5. The hollow insulating rod torsion testing machine according to claim 2, characterized in that: The movable quick connector (12) includes a movable locking sleeve (31) fixed on the surface of the translation mechanism. The movable locking sleeve (31) has an inner cavity with its port facing the fixed quick connector (3). The inner cavity is a conical cavity with a narrow inner surface and a wide outer surface. The locking blocks in the movable quick connector (12) are multiple movable locking blocks (24) evenly and spaced in the inner cavity of the movable locking sleeve (31). The outer walls of the multiple movable locking blocks (24) surround and form a conical surface. A movable limiting plate (25) is provided at the port of the inner cavity of the movable locking sleeve (31).

6. The hollow insulating rod torsion testing machine according to claim 2 or 5, characterized in that: The translation mechanism includes a movable base plate (19) that is slidably disposed on the surface of the worktable, a movable frame (18) that is erected on the surface of the movable base plate (19), and a movable quick connector (12) that is fixed on the end face of the movable frame (18) facing the fixed quick connector (3).

7. The hollow insulating rod torsion testing machine according to claim 1 or 2, characterized in that: The fixed quick connector (3) includes a fixed locking sleeve (27) fixed at the drive mechanism shaft. The fixed locking sleeve (27) has an inner cavity with its port facing the movable quick connector (12). The inner cavity is a conical cavity with a narrow inner surface and a wide outer surface. The locking blocks in the fixed quick connector (3) are multiple fixed locking blocks (22) evenly and spaced in the inner cavity of the fixed locking sleeve (27). The outer walls of the multiple fixed locking blocks (22) surround and form a conical surface. A fixed limiting plate (21) is provided at the port of the inner cavity of the fixed locking sleeve (27).

8. The hollow insulating rod torsion testing machine according to claim 1, characterized in that: A protective cover (8) is also slidably installed on the surface of the workbench.

Images